I'm not really sure how this works, but this website is promising. First you sign up for the tickets, then you are sent an e-mail with a link in it. Click the link in order to next be mailed a super ultra secret code, at which point you save until June 12th at 10AM.
Seriously, I'm not making this up.
It sounds like a bunch of hoops to jump through, but it's free tickets to some rockin' concerts, so it's totally worth it if you ask me! Now if you'll excuse me, I've got to go memorize my secret code before my computer self destructs. And yes, I loved Inspector Gadget as a kid.
[via the forums]